7 Sylvania 3CB6 Vacuum Tubes NOS NIB Lot Of Seven Sylvania 5AM8 NOS new in box milspec GE

new in box milspec GE USN-2B22 tube is still in its shrinkwrap

Noise: -86

New nominal is within one standard deviation of 1900

67 and 70 where minimum (65%) is 50

Measurements indicated in photographs

7 Sylvania 3CB6 Vacuum Tubes NOS NIB Lot Of Seven Sylvania 5AM8 NOS new in box milspec GEThese seven Sylvania made 3CB6 tubes tested to spec on our Paul Hart calibrated TV7 U. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO $250 IN VALUE.